Patents Assigned to Murta Manufacturing Co., Ltd.
  • Microelectromechanical structure with frames
    Patent number: 10429406
    Abstract: A robust microelectromechanical structure that is less prone to internal or external electrical disturbances. The structure includes a mobile element with a rotor suspended to a support, a first frame anchored to the support and circumscribing the mobile element, and a second frame anchored to the support and circumscribing the mobile element between the mobile element and the first frame, electrically isolated from the first frame. The rotor and the second frame are galvanically coupled to have a same electric potential.
    Type: Grant
    Filed: February 25, 2015
    Date of Patent: October 1, 2019
    Assignee: MURTA MANUFACTURING CO., LTD.
    Inventor: Ville Pekka Rytkönen
  • Ladder-type filter, branching filter, and communication device
    Patent number: 6909338
    Abstract: In a ladder type filter, a first inductor is connected in series with a parallel resonator. A second inductor is connected in parallel to a series resonator. The resonant point of the parallel resonator having the first inductor connected in series and the anti-resonant point of the series resonator developed on the lower frequency side of the resonant point of the series resonator, caused by the second inductor connected in parallel, substantially coincide with each other.
    Type: Grant
    Filed: October 30, 2003
    Date of Patent: June 21, 2005
    Assignee: Murta Manufacturing Co., Ltd.
    Inventor: Ryoichi Omote